Modified feedback configuration for sensor fault tolerant control
Document Type
Conference Item
Publication Date
1-1-2008
Abstract
Faults in process control systems can cause undesired reactions and shut-down of a plant, and could be damaging to components, to personnel or the environment. The improvement of reliability, safety and efficiency of the system has become increasingly important. The fundamental purpose of a FTCS scheme is to ensure that faults do not result in system breakdown and although at a lower degree of system performance. The correlative action or prevention measures can be taken to eliminate or minimize the effect of the fault. This paper demonstrates how a feedback control structure can tolerate sensor faults in a temperature control system. The proposed fault-tolerant control design consists of two parts: a nominal performance controller and a model based element to provide sensor fault compensating signals. The nominal controller can have any given structure that satisfies the performance specification, such as a PID controller. When a sensor fault is present, the controller input is augmented to compensate the fault. Results of real time implementation for temperature control are presented to demonstrate the applicability of the proposed FTCS scheme. Sensor faults and disturbance were included to test the proposed design. Deteriorated sensor performance is considered as fault.
Keywords
Disturbance, Model based systems, Sensor fault tolerant control, A plants, Compensating signals, Disturbance, Fault-tolerant controls, Feedback configurations, Feedback control structures, In-process controls, Model based elements, Model based systems, Nominal controllers, Performance specifications, PID controllers, Prevention measures, Real-time implementations, Sensor fault tolerant control, Sensor performance, System breakdowns, Temperature control systems
Divisions
fac_eng
Event Title
2008 10th International Conference on Control, Automation, Robotics and Vision, ICARCV 2008
Event Location
Hanoi, Viet Nam
Event Dates
17 - 20 December 2008
Event Type
conference
Additional Information
ISBN: 978-142442287 DOI: 10.1109/ICARCV.2008.4795844